BSTOR
BSTOR is a Belgian battery storage project developer that develops, finances, owns, and operates large-scale lithium-ion battery assets for grid operators, balancing responsible parties, and industrial energy users under a "Batteries as a Service" model.
- Company typePrivate
- Founded2022
- HeadquartersBrussels, Belgium
- Headcount51–100
- GTM typeB2B
- OfferingServices
What BSTOR does
BSTOR n.v. is a Brussels-headquartered battery storage project developer that develops, finances, owns, and operates large-scale stationary lithium-ion battery assets in Belgium under a "Batteries as a Service" model. The company was formed in June 2022 through the consolidation of battery storage activities of Ackermans & van Haaren (40% shareholder), Wallonie Entreprendre (40%), and BEWATT, the vehicle of Lampiris co-founder Bruno Vanderschueren (20%); it rebranded from Rent-a-Port Green NV and targets a pipeline of at least 150MW of battery projects for financial close by 2024 and operations by 2025. BSTOR owns 75% of ESTOR-LUX (10MW/20MWh), Belgium's first large-scale battery park connected to the High Voltage grid, in commercial operation since December 2021, and has since achieved financial close on D-STOR (50MW/140MWh, with Duferco Wallonie, January 2025) and ESTOR-LUX II (100MW/270MWh, with SOCOFE and SOPAER, April 2025).
The company's product surface spans front-of-meter grid-connected storage (balancing, frequency response, renewable time-shifting) and behind-the-meter industrial storage (peak shaving, demand response, electric mobility, uninterrupted power). Underlying technology is lithium-ion battery storage integrated with technology partners including Fluence, Kyndryl, and Centrica Business Solutions, with ESTOR-LUX featuring approximately 120 minutes of storage duration (2-4x standard systems) to enable deeper market and grid balancing services. BSTOR has structured its projects to attract non-recourse project finance — approximately 50% debt on ESTOR-LUX from Triodos Bank — on a fully merchant-exposed basis, a capability it highlights as a key differentiator.
Revenue mechanics combine (1) project development and structuring fees tied to financial close milestones, (2) long-term asset ownership returns from operating battery parks, and (3) recurring usage-based "Batteries as a Service" fees from end-users. The GTM motion is enterprise field sales to Belgian and European grid operators (notably Elia), Balancing Responsible Parties, Balancing Service Providers, and Industrial Grid Users, with projects developed through direct partnerships and co-development agreements. Performance to date on ESTOR-LUX includes 30,000+ MWh of balancing capacity delivered to Elia, 10.2 MW of average balancing capacity made available to the grid, and 40,000 tons of CO2 saved versus an equivalent gas peaker.
BSTOR firmographics
Firmographics- Name
- BSTOR
- Legal name
- BSTOR n.v.
- Website
- https://bstor.be
- Company type
- Private
- Founded year
- 2022
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- BSTOR is a Belgian battery storage project developer that develops, finances, owns, and operates large-scale lithium-ion battery assets for grid operators, balancing responsible parties, and industrial energy users under a "Batteries as a Service" model.
- Ownership category
- akta.pro rank
BSTOR industry classification
Industry- Product category
- Grid-Scale Battery Storage Services
- NAICS
- Electric Power Generation, Transmission and Distribution (2211), Electric Power Transmission, Control, and Distribution (22112)
- SIC
- Services-Miscellaneous Equipment Rental & Leasing (7350)
- akta.pro primary industry
- Battery Management Systems (BMS) & Safety Controls (EUAFAAAD)
- akta.pro secondary industry
- Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB)
Keywords
Where BSTOR is headquartered
LocationHeadquarters
- HQ city
- Brussels
- HQ country
- Belgium
- HQ region
- Europe
Offices1 record
Markets served
BSTOR business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Technology or R&D, Infrastructure, Personnel, Operations, Supply Chain, Marketing or Sales
Revenue model
- Battery Project Development Services: BSTOR develops, finances, owns and operates battery assets. Revenue comes from project development fees, asset ownership, and lifetime revenue management of battery projects. Services span feasibility, sizing, business model structuring, procurement, financing (debt and equity sourcing), and operational management.
- Batteries as a Service (BaaS): BSTOR offers 'Batteries as a Service' where they handle all design, project management, financing, building, owning and operating of large-scale battery projects. Clients pay a usage fee corresponding to the actual added value delivered.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels4 records
BSTOR product offering
Product offeringCore offering
BSTOR is a B2B battery storage project developer and operator that develops, finances, builds, owns and operates large-scale stationary battery projects in Belgium and Europe. The company offers "Batteries as a Service" (BaaS), handling the full project lifecycle from feasibility, sizing, and procurement through debt and equity financing to long-term asset ownership and operational management. Its portfolio includes front-of-meter grid-connected battery parks (ESTOR-LUX, ESTOR-LUX II, D-STOR) and behind-the-meter storage solutions for industrial grid users.
Product overview
BSTOR offers 'Batteries as a Service' - a comprehensive battery storage solution covering the entire project lifecycle from development through financing, ownership, and decommissioning. The core offering consists of front-of-meter storage projects (large-scale battery parks connected directly to the grid) and behind-the-meter storage solutions (for industrial grid users). Key projects include ESTOR-LUX (10MW/20MWh, operational since 2021, Belgium's first high-voltage grid-connected battery), D-STOR (50MW/140 MWh, Financial Close January 2025), and ESTOR-LUX II (100MW/270 MWh, Financial Close April 2025). BSTOR targets a pipeline of at least 150 MW of battery projects.
Differentiator
Problem solved
Functional benefit
Products and services
- Batteries as a Service (BaaS)
- ESTOR-LUX
- D-STOR
- ESTOR-LUX II
- Front-of-meter storage
- Behind-the-meter storage
Quantifiable outcome
- 30,000+ MWh of balancing capacity provided to Elia
- +3 more outcomes
Companies that use BSTOR
Customer profileNamed customers4 records
Segments3 records
Ideal customer profiles3 records
BSTOR technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
BSTOR partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core and major.
- Duferco WalloniecoreCo-developer of the D-STOR 50MW/140MWh battery project which achieved financial close in January 2025. Partnership represents continued expansion of BSTOR's project pipeline in Belgium.
- SOCOFEcoreCo-developer of ESTOR-LUX and ESTOR-LUX II battery projects. SOCOFE is part of the ESTOR-LUX consortium that developed Belgium's first high-voltage grid-connected battery park. Jointly developed the 100MW/270MWh ESTOR-LUX II project which achieved financial close in April 2025.
- SOPAERcoreCo-developer of ESTOR-LUX and ESTOR-LUX II battery projects. Part of the consortium that developed Belgium's pioneering battery storage project in Bastogne. Jointly developed the 100MW/270MWh ESTOR-LUX II project with financial close in April 2025.
- Rent-A-Port Green EnergymajorFormerly Rent-A-Port Green NV, rebranded to BSTOR. Original developer of ESTOR-LUX with 45% ownership in the project. Parent company that evolved into BSTOR.
- FluencecoreTechnology provider for ESTOR-LUX battery park. Fluence provides battery storage technology and solutions for the project, which became Belgium's first high-voltage grid-connected battery park.
- KyndrylmajorTechnology partner for ESTOR-LUX project providing infrastructure and technical solutions for the battery storage installation.
- Centrica Business SolutionsmajorTechnology and solutions provider for ESTOR-LUX battery park, contributing to the project's technical infrastructure.
Scale indicators6 records
Recent moves7 records
Expansion highlights6 records
BSTOR competitors and assessment
Company assessmentBroad incumbents
- Saft (TotalEnergies): Industrial battery manufacturer and energy storage solutions provider owned by TotalEnergies, active across grid-scale and behind-the-meter storage. Comparable as a broad incumbent operating across the full BESS value chain that competes with BSTOR's developer-led model.
- Fluence Energy: Global market-leading BESS technology provider and project integrator. Comparable as a broader incumbent; BSTOR is also a Fluence customer for ESTOR-LUX, but Fluence competes in the same European front-of-meter storage market with turnkey developer-led offerings.
- Tesla Energy: Global BESS provider via Megapack, supplying large-scale grid-connected battery projects worldwide. Comparable as a broad incumbent offering utility-scale storage with project finance, EPC, and operations bundled, directly competing with BSTOR in Europe.
Emerging players
- Hydrostor: Toronto-based long-duration energy storage developer using compressed-air technology, with Australian and global projects. Comparable as an emerging player in the same long-duration, grid-scale storage category BSTOR targets with its 120-minute systems.
Direct peers
- Storelectric: UK-based energy storage project developer with utility-scale projects. Comparable as a European BESS project developer targeting grid flexibility and ancillary services.
- Harmony Energy: UK-based BESS developer and operator with a multi-hundred-MW pipeline of grid-scale projects. Closely comparable business model: develop, finance, own and operate front-of-meter storage with long-duration systems, supplying balancing services to the TSO (National Grid ESO).
- Alfen: Dutch energy storage and smart-grid solutions provider developing and operating utility-scale and behind-the-meter BESS across the Netherlands and broader Europe. Directly comparable as a European BESS project developer/operator serving grid operators, BRPs, and industrial customers with similar use cases.
- RSE Renewables: Scotland-based renewable energy developer active in UK grid-scale battery storage projects. Comparable as a European BESS developer/operator monetizing flexibility markets via long-duration assets.
- TagEnergy Solutions: European renewable energy and battery storage developer with utility-scale projects in the UK, France, Australia and Iberia. Comparable as a multi-country BESS project developer with grid-balancing and renewables-integration focus.
- Eelpower: UK BESS developer and operator focused on front-of-meter grid-scale storage projects, delivering balancing and ancillary services to National Grid. Comparable in project scale, technology (lithium-ion, long-duration), and revenue mix to BSTOR's ESTOR-LUX.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
BSTOR social profiles
Digital presenceBSTOR financial estimates
Financial estimateRevenue estimate
Valuation estimate
BSTOR leadership team
Management profileNumber of profiles
Profiles8 records
BSTOR funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
BSTOR M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about BSTOR
What does BSTOR do?
BSTOR is a B2B battery storage project developer and operator that develops, finances, builds, owns and operates large-scale stationary battery projects in Belgium and Europe. The company offers "Batteries as a Service" (BaaS), handling the full project lifecycle from feasibility, sizing, and procurement through debt and equity financing to long-term asset ownership and operational management. Its portfolio includes front-of-meter grid-connected battery parks (ESTOR-LUX, ESTOR-LUX II, D-STOR) and behind-the-meter storage solutions for industrial grid users.
Is BSTOR a public or private company?
BSTOR is a private company. It is classified as venture growth investor backed and is currently operating.
When was BSTOR founded?
BSTOR was founded in 2022. It employs 51 to 100 people.
Where is BSTOR based?
BSTOR is headquartered in Brussels, Belgium, in the Europe region.
How does BSTOR make money?
Two revenue lines are on record. Battery Project Development Services are the primary driver. The others are batteries as a Service (BaaS).
Who are BSTOR's main competitors?
Broad incumbents on record are Saft (TotalEnergies), Fluence Energy and Tesla Energy. Hydrostor is listed as an emerging player. Direct peers are Storelectric, Harmony Energy, Alfen, RSE Renewables, TagEnergy Solutions and Eelpower.
Does BSTOR have an API?
No public API is recorded for BSTOR.
What industry is BSTOR in?
BSTOR's product category is Grid-Scale Battery Storage Services. Its primary akta.pro industry code is EUAFAAAD, Battery Management Systems (BMS) & Safety Controls, with a secondary code of IMAGAHAB, Battery Modules & Packs (Industrial/Commercial pack assembly). Its NAICS code is 2211 and its SIC code is 7350.